1. What is Mass Flow Rate?

Definition: Mass flow rate is the mass of a substance that passes per unit of time, typically measured in pounds per hour (lb/hr).

Purpose: This calculator helps engineers and technicians determine the mass flow rate of liquids based on volumetric flow and density.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( W \) — Mass flow rate (lb/hr)
• \( Q \) — Volumetric flow rate (gallons per minute)
• \( \rho \) — Density of fluid (lb/gal)
• \( 60 \) — Conversion factor (minutes to hours)

Explanation: The volumetric flow rate is multiplied by density to get mass per minute, then multiplied by 60 to convert to hourly rate.

3. Importance of Mass Flow Rate Calculation

Details: Accurate mass flow calculations are essential for process control, system design, and equipment sizing in chemical, petroleum, and manufacturing industries.

4. Using the Calculator

Tips: Enter the volumetric flow rate in GPM and fluid density in lb/gal (default 8.34 for water). All values must be > 0.

5. Frequently Asked Questions (FAQ)

Q1: Why multiply by 60 in the formula?
A: This converts the flow rate from per-minute to per-hour basis (60 minutes in an hour).

Q2: What's a typical density for water?
A: Water at standard conditions is approximately 8.34 lb/gal.

Q3: Can I use this for gases?
A: No, this formula is for liquids. Gases require different calculations accounting for compressibility.

Q4: How do I find volumetric flow rate?
A: Use flow meters or calculate from pipe dimensions and velocity.

Q5: What units can I use besides lb/hr?
A: For other units, you'll need additional conversion factors (kg/hr, ton/day, etc.).